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Boston Vermont
3202 3792
3134 3652
3134 3652
3226 3726
3236 3728
3250 3676
3266 3704
3224 3656
3088 3666
3132 3648
3098 3708
3118 3682
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3100 3728
3084 3708
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3064 3666
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3200 3658
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3154 3674
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3106 3684
3136 3708
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3124 3684
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3160 3666
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3140 3664
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3166 3672
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3130 3720
3106 3700
3092 3722
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3150 3692
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3214 3686
3092 3708
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3126 3724
3086 3730
3112 3698
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3156 3732
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3134 3706
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3122 3706
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3110 3724
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3126 3756
3088 3702
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3140 3696
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3130 3736
3140 3752
3114 3696
3108 3732
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3102 3672
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3102 3710
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3084 3784
3120 3804
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3096 3730
3088 3778
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3084 3786
3136 3766
3080 3736
3056 3738
3064 3726
3088 3764
3110 3678
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3080 3856
3074 3816
3114 3792
3136 3808
3104 3802
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3104 3800
3082 3780
3080 3756
3074 3768
3095 3768
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3084 3724
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3074 3760
3092 3708
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3112 3598
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3118 3738
3094 3766
3076 3750
3050 3740
3100 3784
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3172 3706
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3124 3734
3102 3704
3164 3734
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3146 3618
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3184 3728
3134 3692
3104 3688
3140 3694
3108 3694
3098 3744
3186 3734
3180
3122
3124
3148
3166
3080
3112
3144
3142
3112
3094
3066
3136
3128
3072
3090
3080
3092
3076
3098
3102
3076
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3112
3092
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The manufacturer of Boston and Vermont asphalt shingles knows that product weight is a major factor in the customer’s perception of quality. Moreover, the weight represents the amount of raw materials being used and is therefore very important to the company from a cost standpoint. The last stage of the assembly line packages the shingles before they are placed on wooden pallets. Once a pallet is full (a pallet for most brands holds 16 squares of shingles), it is weighed, and the measurement is recorded. The data file (Pallet) contains the weight (in pounds) from a sample of 368 pallets of Boston shingles and 330 pallets of Vermont shingles. Completely analyze the differences in the weights of the Boston and Vermont shingles, using α = 0.05.
File (Pallet):
a/ for the boston shingles, is there evidence that the population mean weight is different from 3150 pounds?
b/ interpret the meaning of the p-value in (a)
c/ for the vermont shingles, is there evidence that the population mean weight is different from 3700 pounds?
d/ interpret the meaning of the p-value in (c)
e/ in (a) though (d) do you have to worry about the normality assumption? explain
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    Boston
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